An urn contains 9 red marbles, 9 white marbles and 8 blue marbles. A child randomly selects three (without replacement). what is the probability that all have the same color?

8.62% probability that all have the same color

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

The order in which the marbles are selected is not important. So we use the combinations formula to solve this question.

Combinations formula:

is the number of different combinations of x objects from a set of n elements, given by the following formula.

What is the probability that all have the same color?

Desired outcomes:

Either all red(from a set of 9), all white(from a set of 9) or all blue(from a set of 8). So

Total outcomes:

3 marbles, from a set of 9 + 9 + 8 = 26. So

Probability:

8.62% probability that all have the same color

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540

6 equilateral triangles